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SD6830 数据表(PDF) 21 Page - AUK corp |
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SD6830 数据表(HTML) 21 Page - AUK corp |
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21 / 34 page ![]() KSI-W002-000 21 CALL addr Binary code : 010100xx xxxxxxxx Syntax : [<label>] CALL addr Operation : (SK1) ← (SK0), (SK0) ← (PC) + 1, (PC) ← addr, addr = 000 ~ 3FF ( addr must be hexadecimal number ) Flags : CY: Unaffected SF: Unaffected Words/Cycles : 2/2 Description : Calls a subroutine located at the indicated address and pushes the current contents of the program counter to the top of stack. The indicated address can be anywhere in the full 1Kbyte memory space. Example : CALL 2FF ; Call subroutine located at the 2FF. The 2FF must be logical address. CLRB @HL.b Binary code : 010110xx Syntax : [<label>] CLRB @HL.b Operation : M[(HL)].b ← 0 Flags : CY: Unaffected SF: Unaffected Words/Cycles : 1/1 Description : Clears the specified bit of data memory addressed by registers H and L to zero. Example : CLRB H ; Clear H to 0 LDL 10 ; Load 10 to L. The 10 must be decimal number. CLRB @HL.0 ; Clear the bit 0 of M[(0A)] to 0. CLRB CY Binary code : 00001000 Syntax : [<label>] CLRB CY Operation : (CY) ← 0 Flags : CY: Set to zero SF: Unaffected Words/Cycles: 1/1 Description : Clears the carry flag to zero. Example : CLRB CY ; Clear CY to zero SD6830 |
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